药根碱靶向凝血因子Ⅻ发挥抗凝血作用的体外研究
刘惠娜 李艳玲 曹旺 邓常清


〔摘要〕 目的 以凝血因子Ⅻ (coagulation factor Ⅻ, FⅫ)為靶点探讨药根碱抗血栓作用的机制。方法 通过Ledock软件将药根碱分子与内源性凝血途径接触激活阶段关键靶蛋白FⅫ、活化凝血因子FⅫ (actived coagulation factor Ⅻ, FⅫa)、凝血因子Ⅺ (coagulation factor Ⅺ, FⅪ)和活化凝血因子Ⅺ (actived coagulation factor Ⅺ, FⅪa)进行分子对接,以结合能低于-5 kcal/mol作为阈值判断药根碱与接触激活因子的结合活性;采用体外凝血实验法检测血浆活化部分凝血活酶时间(activated partial thromboplastin time, APTT)、血浆凝血酶原时间(plasma prothrombin time, PT)、凝血酶时间(plasma prothrombin time, TT);乏因子血浆纠正试验检测FⅫ、FⅪ、凝血因子Ⅸ (coagulation factor Ⅸ, FⅨ)、凝血因子Ⅷ (coagulation factor Ⅷ, FⅧ)、凝血因子Ⅹ (coagulation factor Ⅹ, FⅩ)和凝血因子Ⅶ (coagulation factor Ⅶ, FⅦ)的活性的抑制作用;Western blot法检测药根碱对FⅫ蛋白激活的抑制作用。结果 (1)分子对接实验表明,药根碱与FⅫa、FⅪa结合能均低于-5 kcal/mol,结合活性良好。(2)体外实验中,0.2~0.8 mg/mL药根碱均可显著延长APTT (P0.05)。(3)药根碱各剂量均显著降低FⅫ活性(P0.05)。(4)药根碱各剂量均显著抑制FⅫ蛋白的激活(P0.05) in vitro experiment. (3) Various concentration of jatrorrhizine significantly decreased the activity of FⅫ (P0.05). (4) Various concentration of jatrorrhizine significantly inhibited the activity of? FⅫ protein(P0.05) ......
您现在查看是摘要页,全文长 9755 字符。